%% http://lsr.di.unimi.it/LSR/Item?id=175

\relative c''{
  \key d \major
    a b cis d
  \key g \minor
    a bes c d
  \set Staff.printKeyCancellation = ##f
  \key d \major
    a b cis d
  \key g \minor
    a bes c d
}